Patent · US Expired

Process for adjusting the structural and/or surface character of oxides

US4894357A · kind A · utility

10Cited by

16References

18Claims

0Family size

Assignee

Kali-Chemie Aktiengesellschaft · DE

Inventors

Bernd Hupe · Hameln, DE
Robert J. Walter · Thousand Oaks, US

Key dates

Filing date	Oct 31, 1985
Grant date	Jan 16, 1990
Priority date	—
Expiry date	Oct 31, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/54
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for adjusting at least one of the structural and surface characteristics of an oxide material, e.g. SiO.sub.2 or Al.sub.2 O.sub.3, by dehydration of a water-containing oxide gel under supercritical conditions by extracting the water with an extraction agent such as CO.sub.2 at a pressure above the critical pressure of the extraction agent.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.